[R] generating a sequence

[Prof Brian Ripley]

> From: "KAREN KOTSCHY" <karen at gecko.biol.wits.ac.za>
> To: r-help at stat.math.ethz.ch
> Date: Tue, 21 Dec 1999 14:20:55 GMT+2
> Subject: [R] generating a sequence
> 
> Hi everyone
> 
> I'm trying to generate a vector of the form
> a <- c(1,2,3,4,1,2,3,1,2,1) where n = 5
> in a general way, where n can be any positive integer.
> 
> I've run out of ideas. Does anyone have any suggestions?

I am a bit puzzled here. Why is that n=5 not n=4? Anyway, try

A <- matrix(1, n-1, n-1)
rA <- row(A)
rA[rA + col(A) <= n]

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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